John Calipari continues to work magic on the recruiting trail at Kentucky; Can Arizona, UCLA and Colorado lead Pac-12 resurgence?

Kentucky's John Calipari is on the verge of securing the nation's top recruiting class for the fourth year in a row.

Is Kentucky in the midst of the greatest recruiting run in modern college basketball history?

The Wildcats celebrated the opening of the spring signing period Wednesday by welcoming Class of 2012 No. 1 prospect Nerlens Noel to the Big Blue Nation. Securing a pledge from the 6-foot-10 center will likely bring the nation's top recruiting class to Lexington for the fourth year in a row.

Kentucky has four of the top 34 prospects in MaxPreps.com's Class of 2012 Top 100 en route to campus next fall. A year ago, Anthony Davis and Michael Kidd-Gilchrist headlined a group that featured four of top 12 players in America. Five-star talents Terrence Jones and Brandon Knight highlighted a 2010 contingent that was also regarded as the nation's best.

Since Calipari arrived at Kentucky in 2009, a dozen MaxPreps five-star prospects have elected to become Wildcats.

Programs still looking for talent are running out of options as just six Top 100 senior remain undecided. The spring signing period ends May 16.

3. UCLASignees/Commitments: No. 2 Shabazz Muhammad (6-6, 215, SG), No. 3 Kyle Anderson (6-7, 215, PG/SF), No. 57 Jordan Adams (6-5, 230, SG/SF)Impact: Pac-12 rival Arizona gets the nod over UCLA based on numbers and the fact that Muhammad and Anderson aren't likely to stick around long. As the doors open to a new Pauley Pavilion, 2012-13 is going to be a pressure-filled year for Ben Howland and the Bruins.